<template lang="html">
  <!--8-3 中为什么城市列表的button 要包裹那么多层？有一个button-list应该就够了吧，为什么还要一个wrapper?-->
  <div class="list" ref="wrapper">
    <div>
      <div class="area">
        <div class="title border-topbottom">当前城市</div>
        <div class="button-list">
          <div class="button-wrapper">
            <div class="button">{{this.currentCity}}</div>
          </div>
        </div>
      </div>
      <div class="area">
        <div class="title border-topbottom">热门城市</div>
      </div>
      <div class="button-list">
        <div class="button-wrapper" v-for="item of hotCities" :key="item.id" @click="handleCityClick(item.name)">
          <div class="button">{{item.name}}</div>
        </div>
      </div>
      <div class="area" v-for="(item,key) in cities" :key="key">
        <div class="title border-topbottom" :ref="key">{{key}}</div>
        <div class="item-list">
          <div class="item border-bottom" v-for="innerItem of item" :key="innerItem.key" @click="handleCityClick(innerItem.name)">{{innerItem.name}}</div>
        </div>
      </div>
    </div>
  </div>
</template>
<script>
import Bscroll from 'better-scroll'
import {
  mapState,
  mapMutations
} from 'vuex'

export default {
  name: 'CityList',
  props: {
    hotCities: Array,
    cities: Object,
    letter: String
  },
  computed: {
    ...mapState({
      currentCity: 'city'
    })
  },
  methods: {
    handleCityClick (city) {
      // console.log(city)
      this.changeCity(city)
      this.$router.push('/')
    },
    ...mapMutations(['changeCity'])
  },
  mounted () {
    this.scroll = new Bscroll(this.$refs.wrapper, {
      click: true
    })
  },
  watch: {
    letter () {
      // console.log(this.letter)
      const element = this.$refs[this.letter][0]
      this.scroll.scrollToElement(element)
    }
  }

}

</script>
<style lang="stylus" scoped>
  @import '~styles/varibles.styl';
  .border-topbottom&:before {
    border-color: #ccc
  }

  .border-topbottom&:after {
    border-color: #ccc
  }

  .border-bottom&:before {
    border-color: #ccc
  }

  .list {
    /*display none*/
    overflow: hidden;
    position: absolute;
    top: 1.58rem;
    left: 0;
    right: 0;
    bottom: 0;
    .title {
      line-height: .54rem;
      background #eee;
      padding-left: .2rem;
      color: #666;
      font-size: .26rem;
    }
    .button-list {
      overflow: hidden;
      padding: .1rem;
      .button-wrapper {
        float: left;
        width: 33.33%;
        .button {
          margin: .1rem;
          padding: .1rem 0;
          text-align center;
          border: .02rem solid #ccc;
          border-radius 0.06rem;
        }
      }
    }
    .item-list {
      .item {
        line-height .76rem;
        padding-left .2rem;
      }
    }
  }

</style>
